Fitech

[ghcoe]

I tried briefly to look and find out if there is a vacuum advance system built into the fitech ignition. Some kind of low load cruise extra advance.

If I were to guess it is tied to the MAP sensor.

[Cataldo]

I tried briefly to look and find out if there is a vacuum advance system built into the fitech ignition. Some kind of low load cruise extra advance.

If I were to guess it is tied to the MAP sensor.

That would make sense. Hopefully I can call Fitech today.

[babywag]

Timing is based off multiple values in program.
All obtained from sensor readings and tables.

In most cases the main timing table is based off engine rpm & MAP sensor.
Many other factors like coolant temp, are also included.

[FSJ Guy]

X2 what babywag said.

An electronic timing control can adjust the timing to whatever the engine needs. Sure, you can "simulate" vac advance and centrifugal advance, but you don't have to. Give it the timing that the engine needs.

[Dr. Marneaus]

We got his locked out duraspark with an adjustable reluctor trigger installed over the weekend and apparently the truck is running really well now that fitech is controlling timing.

13260201_10100956203028498_3186403105435886998_n.jpg

[FSJ Guy]

Adjustable reluctor??? For rotor "phasing"?

[nightglide]

I made my reluctor adjustable just like Bill Hamilton's write up on binder planet

[FSJ Guy]

Interesting. I've never had an issue with spark jumping. I just leave the vacuum advance mechanism connected but don't connect any vacuum to it!

[Bill usn-1]

To "correctly" modify a distr from mech adv to computer controlled the rotor phasing should be changed.
You can do it by moving the reluctor on the shaft and using a set screw or moving the base plate and fixing it in the new location.
There are after market distributors that have an adjustable rotor as a way to also set the phasing.
There is a very distinct difference in the correct phasing between the 2. Just because someone gets by with not properly converting does not mean the is the correct way to do it.

A V8 distr cap has 45* between the contacts. That's 90* of timing.
Max adv with base+mech+vac(timing table) can exceed 50* of timing under light throttle cruising.
If the phasing is incorrect the spark can crossfire to the previous contact in the cap.
One thing that helps to mask the problem is if someone swaps to the large ford distr cap to increase the physical distance between terminals.
That still doesn't make it correct.
Another thing to consider is the width of the blade on the reluctor equals about 7* of timing.
That's a lot of timing to be off.

The distr gets stabbed.
Reluctor gets lined up with the pickup and you should not need to move the distr more than a couple degrees if properly set up.......
You will also find the engine has no problem idling at 0*.

Here's a couple pics from one shipping today.

AMC Duraspark01.jpg

AMC Duraspark02.jpg

AMC Duraspark03.jpg

[Dusty]

Just wondering how you like your FiTech system now that you have it running?

[nightglide]

I like it. Didn't really like the timing control tho......not sure if I had rotor phased right or not. Now I have the tfi upgrade with a msd cdi box.
It still needs some tweaking here and there.....nice thing about fitech.....just pull over, adjust it, drive away.
Wish I had of recorded fuel milage before swap because it seemed to go up alot after

[Dusty]

That's cool to hear.


Between you and Drew I really have to look at these systems more.
I just found out Holley is coming out with a system to compete with the FiTech system?

[Dr. Marneaus]

That's cool to hear.


Between you and Drew I really have to look at these systems more.
I just found out Holley is coming out with a system to compete with the FiTech system?

Yeah The sniper....but I thinkthey have been coming out with it for some time now and it's still not on shelves

[REDONE]

I really wanted the Fitech but the $1000 one I wanted with spark control was backordered until the 26th. It's still an option for my dads wag. It should have my 401 installed by the weekend. My dads going to run it around and break it in with an ede' for a few weeks but is looking at FI before Ouray.

[nightglide]

If you do order one go thru pace performance and ask for Johnny. My buddy ordered from him and I think he gave him a additional 5% off. He ended up with the power adder which is a step up from mine for only $50 more.

[Cataldo]

Any more updates

[nightglide]

Just drove it about 150 miles on a camping trip in Cali this weekend including a long trail run with some high elevation with no issues. Only problem that pops up sometimes is that if I travel at a good rate of speed, say 55 or better, and have to come to a sudden stop and just push clutch in it has stalled. I know its a issue with fi and a standard transmission. There is a adjustment in the fuel decay that needs to be dialed in.

[Cataldo]

Nightglide,

any more updates on the Fitech unit? has that stalling issue been resolved?

[nightglide]

That has. It's just a adjust with the handheld.
I'm now having a fuel pump a fuel pump issue. I think my inline pump is taking a crap already.
Time to look into intank pump. Looking at the Novak fsj one

[REDONE]

I'm now having a fuel pump, I say a fuel pump issue.

Keep us updated, still haven't pulled the trigger on a FI for my dads 401 and still looking at the Fitech really hard.